Process description of liquid air separation plant

After impurity removal, air is taken by compressor and compressed to ~1.1MPa. After cooling down, harmful components, such as moisture, CO₂, C₂H₂ are removed by purifying system.
After purification, compressed air is cooled down by the main heat exchanger and cold refrigerator, and sent to rectification column for rectification. Through sub-cooler, liquid air, liquid waste nitrogen and liquid pure nitrogen are sent to upper column for secondary rectification. In upper column, liquid oxygen at 99.6% is obtained at bottom, which is delivered out of cold box via sub-cooling as product.
Waste nitrogen is drawn from top of upper column. Through heat exchanger, it is expanded to provide coldness to the whole system. After warming up, it is delivered out of cold box and divided into 2 streams. First stream goes to purifying system for regeneration of molecular sieve. Second stream is delivered to pre-cooling system to cool down the cooling water.
While third stream of waste nitrogen delivered out of cold box is compressed by recycle compressor and booster of turbine. Afterwards, it goes into cold box and is cooled down by heat exchanger. Cool gas is expanded subsequently to supply coldness to whole system. After expansion, it is warmed up in heat exchanger and goes for another round of circulation.
The production of argon works on hydrogen-free rectification process specified as following described: Liquid argon fraction is drawn out from the upper column into crude argon column and pure argon column, where liquid argon product is got through rectification.


(source:http://www.airseparation-plant.cn/tag/air-separation-plant-manufacturer/)

Process description of gas air separation plant

Eliminated from mechanical impurity by the air filter, the required amount of process air is compressed by centrifugal air compressor to ~0.5MPa. Afterwards, it goes into water-cooling tower for cleaning and pre-cooling. The removal of harmful components, such as moisture, CO₂, C₂H₂ are carried out by activated alumina and molecule sieve in molecule sieve purifier, which will automatically alternate.
After purification, small stream of compressed air is compressed secondarily by booster end of turbine. Through cooling via water cooler, it goes into main heat exchanger for secondary cooling. Then it is drawn from middle part of heat exchanger to expander of turbine. Afterwards, expanded air is sent to upper column for rectification.
After purification, large stream of compressed air is cooled down to its dew point temperature in main heat exchanger and goes to lower column. Through primary rectification, liquid nitrogen is got the top of lower column, and liquid air is got at the bottom. Through sub-cooling via liquid air &liquid nitrogen sub-cooler, liquid nitrogen and liquid air are sent into respective position of upper column. Through secondary rectification, gas oxygen is got at the bottom of upper column. Through warming up to ambient temperature in sub-cooler and main heat exchanger; gas oxygen is delivered out of cold box into oxygen pipe as product. The waste nitrogen got at the top part of upper column is warmed up through sub-cooler and main heat exchanger and delivered out of cold box. One stream goes to purifier for regeneration of molecular sieve; the other stream goes to water-cooling tower of pre-cooling system, to cool down the recycle water.
The production of argon works on hydrogen-free rectification process specified as following described: Liquid argon fraction is drawn out from the upper column into crude argon column and pure argon column, where liquid argon product is got through rectification.

(source:http://www.airseparation-plant.cn/process-description-of-gas-air-separation-plant/)

Air separation manufacturing in workshop of Suzhou Xinglu

Suzhou Xinglu Air Separation Plant Science and Technology Development Co.,Ltd. focuses on the research&development, design and manufacture of cryogenic technical field. The video will show you the air separation manufacturing in workshop.

(source:http://www.airseparation-plant.cn/air-separation-manufacturing-in-workshop-of-suzhou-xinglu/(

Various usages of Hydrogen

1.Petrochemical industry production: as the raw material gas of hydrogenation of ammonia, methanol, petroleum refining, etc. As well as  organic materials of organic hydrogenation.
2.Metallurgical industry: it is widely used in the production and processing of tungsten, molybdenum and titanium just as reduction gas and protection. And it used in production and rolling of thin steel plate, strip steel strip and silicon steel sheet;Production of precision alloy, powder metallurgy material.
3.Electronics industry: mainly used in the production of electronic materials, semiconductor integrated circuits and electro-vacuum main devices.
4.Building materials and light industrial production: as protective gas and combustion gas, such as quartz glass and artificial gemstone production, hydrogen monoxide is used to obtain high temperature;In float glass production,hydrogen is used for protect gas and so on.
5.Power industry: as a coolant for generator sets.
6.Balloons and airbags: as filling gas.
7.Liquid hydrogen is an important liquid fuel for aerospace and rocket.
8.Make fuel cells with hydrogen.
9.It has come true that we can use hydrogen fuel in cars and dispose of chemical waste products



(source:http://www.airseparation-plant.cn/various-usages-of-hydrogen/)

Various usages of acetylene gas

1. Pharmaceutical industry: used to make contraceptive drugs.
2. Atomic absorption analyzer: used as carrier gas.
3. The important use of dissolved acetylene is metal welding and cutting, spraying, surface quenching and heat processing.
4. The earliest application of acetylene gas is used for lighting, and mainly used for beacon light.

(source:http://www.airseparation-plant.cn/various-usages-of-acetylene-gas/)

Liquid nitrogen usage in industry, biology and medicine

Industrial use:
In industrial production, through the liquid compressed air fractionation method to obtain the liquid nitrogen, can be used as a depth refrigerant, due to its chemical inertness, can directly contact with biological tissue, frozen immediately and won’t destroy biological activity.

1. Quickly freeze and transport food, or make ice products.
2. Study on low temperature physics.
3. Demonstrate low temperature state in science education.Soft objects soak in liquid nitrogen in normal temperature, which can be as brittle as glass.
4. Provide the temperature of superconductivity of high temperature superconductor.
5. Refrigerant can be used to quickly freeze biological tissue to prevent the tissue from being destroyed.
6. Used for industrial nitrogen fertilizer manufacturing.
7. Used for chemical testing, such as BET ratio surface area test method.

Biological and medical uses:

1. Eliminate red imported fire ants.
2. In surgery, quick freezing can be used to help stop the bleeding and remove the superficial layers of the skin.
3. Storage of living tissue, biological samples and sperm eggs.

(source:http://www.airseparation-plant.cn/liquid-nitrogen-usage-in-industry-biology-and-medicine/)

Various usages of Helium in all kinds of industries

Helium widely used military-industrial complex, scientific research, petrochemical, refrigeration, medical, semiconductor, pipeline leak detection, superconducting experiment, metal manufacturing, deep-sea diving, high precision welding, optoelectronic products, etc.
1.Low temperature cold source: using liquid helium low boiling point : 268.9 ℃ , can be used for liquid helium cryogenic cooling. However,cryogenic cooling technology in the field is wildly used ,superconducting technology has a wide application of superconducting materials in low temperature (100 k) shows the superconducting characteristics, in most cases, only liquid helium is easier to achieve such low temperature.Superconducting applies in magnetic train in the transportation industry, and nuclear magnetic resonance (NMR) imaging in the field of medical equipment as well.
2.Balloon inflation: because the helium gas density is far less than the air (air density of 1.29 kg/m3, the density of helium is 0.1786 kg/m3), and the chemical nature very inactive, more hydrogen safety (hydrogen can burn in the air, could cause an explosion), helium is often used in the spaceship or advertising balloons’ filling.
3.Test analysis:nuclear magnetic resonance analyzer is commonly used in instrumental analysis ,the superconducting magnets need to use liquid helium cooling, helium gas of gas chromatographic analysis of often used as a carrier gas, with the characteristic of good helium gas permeability and nonflammable, helium is used in the vacuum leak detection, such as helium mass spectrometer leak detector, etc
4.Shielding gas: with helium inert chemical property and helium as shielding gas often used in metal welding,such as magnesium, zirconium, aluminum, titanium and etc.
6.Other aspects: helium gas can be used as a high vacuum devices, nuclear reactor can be used to conveying liquid hydrogen and liquid oxygen plant for the rocket and the spacecraft , as pressurized gas of liquid propellant. Helium is used as the reactor cleaning agents, breathing in the field of Marine development with mixed gas, the filling gas of gas thermometer and etc.

(source:http://www.airseparation-plant.cn/various-usages-of-helium-in-all-kinds-of-industries/)